CVE-2026-26133
HIGHCVSS 7.1/10EPSS 0.43%
Last modified
CVE-2026-26133 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.
Description
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | 365 Copilot | < 2.107.2 |
| Microsoft | 365 Copilot | < 16.0.19815.10000 |
| Microsoft | Edge | < 145.3800.99 |
| Microsoft | Excel | < 2.106.2 |
| Microsoft | Excel | < 16.0.19822.20038 |
| Microsoft | Loop | < 2.106 |
| Microsoft | Onenote | < 16.0.19725.20142 |
| Microsoft | Onenote | All versions |
| Microsoft | Outlook | < 5.2605.0 |
| Microsoft | Outlook | All versions |
| Microsoft | Power Bi | < 2.2.260210.21290750 |
| Microsoft | Power Bi | All versions |
| Microsoft | Powerpoint | < 2.106.2 |
| Microsoft | Powerpoint | < 16.0.19822.20038 |
| Microsoft | Teams | < 1.0.0.2026043102 |
| Microsoft | Teams | < 8.3.1 |
| Microsoft | Word | < 2.106.2 |
| Microsoft | Word | < 16.0.19822.20038 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-26133?
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
How severe is CVE-2026-26133?
CVE-2026-26133 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2026-26133?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-26133?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST